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Page 3 <br /> 2. Re-analysis of materials. A full depth sample result may substitute for layered <br /> results in situations where full-depth sampling is determined appropriate by an <br /> accredited building inspector. However,where sampling of joint compound has <br /> detected asbestos,the overall wallboard materials must not be reported as asbestos <br /> free. <br /> Previous sampling may have been conducted for significantly different projects <br /> and specifically focused on joint compound(for example, samples assessing a <br /> prior painting project where sanding of the wall surface was planned). It is also <br /> common practice for laboratories to report layer by layer results for quality <br /> control reasons,whether or not this analysis is requested. In either case, it is <br /> improper to ignore the known presence of asbestos,but additional information <br /> may be collected and used to characterize the overall hazard due to asbestos in the <br /> current work. <br /> An accredited building inspector must conduct any reassessment of wallboard <br /> systems. The reassessment must be conducted based on objective information <br /> collected during inspection of the wallboard system by an inspector or laboratory <br /> analysis of samples collected in accordance with EPA protocols. Pertinent <br /> objective information includes field documentation of the layers present in the <br /> samples and the relative quantities of materials represented by the samples. The <br /> level of proof should be equivalent to that for rebuttal of PACM designation and <br /> EPA inspection and analysis protocols must be followed, If resampling is <br /> conducted with full depth analysis and no asbestos is detected,the wallboard <br /> system must still be reported as containing trace or less than one percent asbestos <br /> based on the initial sampling. <br /> B. What are the work practice requirements for handling wallboard materials under <br /> WAC 296-62-07712 in the asbestos standard? <br /> 1. Wallboard systems with greater than one percent asbestos content. Where <br /> asbestos-containing joint compound has been identified and the overall asbestos <br /> content of the wallboard system is greater than one percent,then work that <br /> disturbs the wall is Class II asbestos work. L&I considers the work an "asbestos <br /> project" or"asbestos abatement project" if the wall area involved is greater than <br /> one or three square feet,respectively. This also applies to any asbestos containing <br /> surfacing material. <br /> Such work falls under the full requirements of the asbestos standard, including all <br /> Class II work practice and certification requirements. "Asbestos project" and <br /> "asbestos abatement project" are specifically defined terms in Washington State <br /> law on asbestos related to the certification requirements for contractors and <br /> workers. These terms apply to work where there is a possible exposure to <br /> asbestos above the permissible exposure limit. <br /> —policy continues on reverse of page— <br />